William g



w. IG. Woon.

l DRAG BUCKET.

APPLICATION FILED MAR. 23. 191.7.

Patented June 1?, 1919.

Y INVENTUM WILLIAM W00@ ATTORNEY WILLIAM G. WOOD, 0F SAN FRANCISCO, CALIFORNIA, ASSIGNOR OF ONE-HALF TO FRANK B. MGKEVIT'I', SACRAMENTO, CALIFORNIA.

DRAG-BUCKET.

Specification of Letters Yatent.

Patented J une 17, 1919.

Application led March 23, 1917. Serial No. 156,944.

T0 all whom t may concern.'

Be it known that I, WILLIAM G. WOOD, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State ofCalifornia, have invented new and useful Improvements in Drag- Buckets, of which the following is a specilication. v

The object of the present invention is to provide, in a drag bucket, means whereby the material in the bucket can be loosened to prevent it from adhering to the walls of the bucket and to enable it to be readily discharged therefrom, which means will be automatically operated by the upward tilting of the bucket.

In the accompanying drawing, Figure 1 is a broken vertical section of one form of my invention; Fig. 2 is an end view of another formthereof; Fig. 3 is'a broken side view of the latter form showing the bucket in a dumping position; Fig. 4 is a. detail perspective view of parts of the mechanism.

Referring to the drawing, 1 indicates my improved drag bucket having a bale 2. The back 3 of the bucket is slidable therein, being guided by guide bars 8 and having in the centers of its top and bottom edges grooves 11 to receive said guide bars, said guide bars having at their front ends enlargements 9 forming stops for the back of the bucket. To the central portion of the rear face of the back of the bucket are secured arms 12 extending from a piston rod 13 connected to a piston 14 slidable in a cylinder 16 communicating through its side by inlet and exhaust ports 17, 18, with a steam chest 19 and an exhaust passage 21 in a slidable valve 22. Said steam chest is connected at one end with a flexible pipe 23, the other end of which is connected with a source of supply of steam. Instead of steam, compressed air may be used as a pressure fluid. The slide valve is connected with one end of a rod 27 which passes through an end of the steam chestfand is operatively connected with one end of an arm of a bell crank lever 64 pivoted, as shown' at 65, on a standard 66 eX-tendin from one end of the'cylinder, the enter end of another arm thereof carrying a weight Vhen the bucket is in a horizontal posltion the weight 67 is in such a position relative to the pivot of the bell crank lever that its weight moves the valve to a position to supply steam to the inner end of the steam cylinder. Vhen the bucket is tilted to a vertical position, said weight acts upon the other side of the pivot of the bell crank lever, and tends to move the valve to a position 1n which the steam is admitted to the outer end of the cylinder, thus impelling the piston to force the back 3 into the bucket. Thus the back of the bucket is moved into the bucket automatically with the turning of the bucket to its vertical position, and returned to its normal position when the b ucket is returned to its horizontal position. In the form of the invention shown 1n Figs. 2, 3, and 4, I secure lon the inner side of each arm of the bail a plate 49 having a cam groove 52 which engages a pin 53, carried by an arm 54, secured to and extending from, a shaft 56 having its bearings in the Walls of a chamber 57, and carrying a forked arm 58 which by a rod 59 actuates the slide valve as in the first described form of the invention.

I claim l. A drag bucket having a back slidable forwardly and backwardly therein, and manually controllable means for moving the back either forwardly or backwardly in the bucket as desired and automatically operated when the bucket is tilted upwardly.

2. A drag bucket having a movable back and means. movable with the bucket, for pressing said back into the bucket to loosen the material therein and automatically operated when the bucket is tilted upwardly.

3. A drag bucket having a back slidable forwardly and backwardly therein, means, movable with the bucket, for moving the back either forwardly or backwardly in the bucket as desired, and automatically operated when the bucket is tilted upwardly, and means for manually controlling said moving means from a distant point.

4. In combination with a bucket having a baalt movable forwardly baclrwardly therein, a cylinder secured on the rear portion of the bucket and a device reciprocable in Isaid cylinder and operatively connected to the back of the bucket and automatically 5 reciproca-ted when the bucket is tilted up- Wardly.

5. A drag bucket having a back Slidable manually controllable means for movingthe back either forwardly or backvvardly in the bucket as desired and automatically operated When the bucket is moved from a horizontal to a vertical position or conversely.

W. Gr. WOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

forwardly and backwardly therein, and 

